User's Manual

mBSC-H DAS System
Installation Manual Issue 7
© 2009-2014, BTI Wireless Page 10
Figure 3-3. Network Management System Software Components Folder and Desktop Icon
3.1.3 Remote Unit
The Single-Band Master Remote Unit, shown in Figure 3-4a, 3-4b, 3-4c and 3-4d, consists of an optical
module (O/E), a downlink power amplifier, an LNA, and duplexer. The Optical module converts the
downlink optical signal from the FIU module in the HU and splits the RF signal into 3 RUs. It also converts
the uplink RF signal to an optical signal and simultaneously sends it to the FIU module in the HU for
distribution to the BIU modules. Each optical module can support 3 RUs in any combination of different
bands.
The Single-Band Master Remote Unit provides the following functions:
 Converts the forward optic signal to RF signal.
 Boosts the forward RF signal from the HU to a higher power level (max output: 80W).
 Amplifies the uplink signal from the antenna to improve the system receive sensitivity.
 Supplies in-band messaging between the HU and RU for RU Alarms and configuration.
The Remote Unit has been designed for minimal maintenance. Maintenance recommendations include a
once yearly inspection and cleaning, if needed. A fan alarm will be generated should the fan current drop
below one third of its required current.